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Finding the Fourth Proportional to 894.62, 1,331.78 and 889.76

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Solution

The fourth proportional to 894.62, 1,331.78 and 889.76 is: 1,324.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.62 : 1,331.78 = 889.76 : x
  2. Step 2: Convert to fraction form
    894.62/1,331.78 = 889.76/x
  3. Step 3: Cross multiply
    894.62x = 1,331.78 × 889.76
  4. Step 4: Simplify right side
    894.62x = 1,184,964.57
  5. Step 5: Solve for x
    x = 1,184,964.57/894.62
  6. Step 6: Final answer
    x = 1,324.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.